Game concept
House Head Interaction
From the game's encyclopedia
Special Interactions that can be made by a House Head against members of their House.
The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.
House Head Interaction is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "Special Interactions that can be made by a House Head against members of their House." It is part of House Head. Patch 1.20.1.2, from game/common/game_concepts/00_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
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Source: game/common/game_concepts/00_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.